<p class="03Abstract">This article reports the synthesis of seven Zn(II) complexes containing <em>N</em>-acylhydrazone ligands (<strong>L1 </strong>to<strong> L7</strong>) and the assessment of their antioxidant. Microwave assisted-synthesis of ligands with ZnCl<sub>2</sub> in MeOH yielded tetrahedral Zn(II) complexes with a 1:2 metal: ligand ratio, characterized by HRMS, FTIR, and UV-Vis spectroscopy, thermal and electrochemical analyses, and DFT calculations. The <strong>(L3)<sub>2</sub>Zn</strong> complex exhibited the lowest thermal stability, and <strong>(L6)<sub>2</sub>Zn</strong> and <strong>(L7)<sub>2</sub>Zn</strong> were the most stable. XRD powder showed that all complexes have good crystallinity with crystalline dimensions ranging from 32 to 86 nm. Cyclic voltammetry of Zn(II) complexes indicated a reversible redox process for <strong>(L4)<sub>2</sub>Zn</strong> and an irreversible process for the remaining six complexes: <strong>(L1)<sub>2</sub>Zn </strong>to <strong>(L3)<sub>2</sub>Zn</strong> and <strong>(L5)<sub>2</sub>Zn</strong> to <strong>(L7)<sub>2</sub>Zn</strong>. Antioxidant activity of ligands and complexes was assessed by the DPPH method; the <strong>L7 </strong>ligand and corresponding <strong>(L7)<sub>2</sub>Zn</strong> complex exhibited good activity, IC<sub>50</sub> = 65.30 μmol.l<sup>-1 </sup>and 78.70 μmol.l<sup>-1</sup>, respectively, when compared with standard ascorbic acid. <strong></strong></p>
The new fluorinated Biphenyl-Schiff Base 3 was synthesized by a synthetic route involving three steps, with the formation of two intermediates precursors. Primarily by the result of a Suzuki-Miyaura cross-coupling reaction forming the fluorinated 4aminobiphenyl (1) and later by the result of the nucleophilic substitution SN2 obtaining the intermediate 4-[2-(dimethylamino)ethoxy]-benzaldehyde (2). The Schiff base 3 was obtained through the condensation reaction between intermediates 1 and 2. The methodology involving the reaction to form intermediate 2 proved to be more effective when aided by microwave irradiation providing a significantly higher yield in a shorter time. The GC-MS showed that all compounds were synthesized by the proximity of the calculated m/z ratio and that found. In addition, theoretical calculations showed that the
One of the most widely used energy sources nowadays is nonrenewable, but the excessive consumption of these resources leads to environmental issues. Therefore, renewable energy sources have received much attention, including photovoltaic energy. A novel technology known as “third‐generation solar cells” is being studied, and in this class, the polymeric solar cells (PSCs) and the perovskite solar cells (PVSKs) can be highlighted. Several researchers are trying to find new ways to improve the energy conversion efficiency (PCE) and long‐term stability of these devices. In particular, PVSK has already demonstrated high PCE, but there is still a long way to go to develop more stable and better processable devices for large‐scale production. In the case of PSC, processability is a positive factor since its flexible films have great mechanical stability and can be processed in roll‐by‐roll systems. However, efficiency is still a challenge for researchers. Nevertheless, both types of devices are good alternatives for silicon cell substitution. However, further studies are needed to address the inherent problems of each device technology and move to large‐scale production.
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